“They are only young and still developing, so management insist they wear hi-tech earpieces and filters to reduce the volume of the screaming and the music.

“When Louis made his comments he had really bad earache. Thankfully, this has now cleared up but he knows to be careful in future."

Louis isn't the first music star to suffer from hearing problems. Chris Martin recently revealed he also suffers from tinnitus - a constant ringing or buzzing in the ear - after being regularly exposed to loud music.